Actually, the current plan is to unify the tag belts so I'd be surprised if they went with the no-contest there.

Taker/HBK remains the match I'm looking forward to the most, I think it's the one most likely to steal the show from the championship matches and even MITB. I'd expect Taker to win this one as so far they've been building up HBK as never having lost to Taker (I'm not sure about that but he has gone over him a fair few times) and HBK isn't really the person to end the streak as he doesn't need the rub. It seems unlikely they'd end the streak until Taker is ready to retire (if they ever in fact have him lose) and there haven't been any whispers of that in the dirt sheets.
The Divas Battle Royal probably won't be spectacular but there'll be some former names competing with one of them likely winning rather than a current Diva. If you're a WNW Premium Subscriber you'll know but we're not allowed to repost those articles. I don't imagine it'll take up too much time.
Money in the Bank should be a good spotfest as always but Christian is the only one that stands out to me as a likely winner. No one's repeated yet (save for Edge winning it off Kennedy afterwards and that doesn't really count as such), Kofi Kingston isn't really ready, Finlay is really filler, Kane and Mark Henry seem unlikely, Shelton Benjamin never does seem to get that push to the next level and CM Punk won it last year. MVP's another possibility I guess but I'd pick Christian over him.
The Legends Handicap match is actually a bit of a letdown though I've read that other plans fell through leaving them to come up with a backup plan on the fly. Still, having Jericho attack all these legends and then end up facing them in a 3 on 1 seems like an angle we'd see in Smackdown vs RAW. I could see Jericho going over but it seems less likely, for the feud to culminate the legends need to prevail and thus teach his character a lesson in respect, if nothing else 1 going over 3 is a bit too unlikely even in professional wrestling. Better that Jericho takes a fall against three legends than Mickey Rourke. Kind of a shame we won't see Ric Flair wrestle but you certainly have to respect that he's sticking by his retirement in an industry where so many retire over and over again. I wouldn't mind if he did come out of retirement but I think it's very classy that he's choosing not to and it shows how much respect he has for the business.
Supposedly the tag titles are going to be unified so as I said someone should be going over in this one. It depends on whether they want to push Morrison and Miz as singles wrestlers and I could see them doing that, certainly as far as Morrison is concerned. However, they've been really good as a tag team so I don't know, neither scenario seems more likely. In that respect they certainly could go for a no-contest but I don't think it's as likely, I think you need your fair share of heels going over at Wrestlemania so in that regard I lean towards Miz and Morrison unifying the belts and continuing on as a team for a while longer.
The match between the Hardys should also be one of the best on the card, I'm not that confident in a pick though. It would make sense for either to go over, Jeff having been screwed over by Matt for the last couple of months beginning at the Royal Rumble and to further fuel Matt's anger and jealousy/resentment. However, having the heel win does prolong the feud and Jeff getting revenge at Wrestlemania seems too predictable and could kill some of the heat on the angle. Again, you need a few heels to go over at Wrestlemania and in that respect Matt seems a bit more likely to come out on top with a dirty finish.
JBL/Rey for the IC title depends on the truth to the rumours that JBL could be retiring again soon. I like Rey's chances of going over but it depends on how many other titles change hands, how much longer JBL is going to be around and where else heels go over. I could see a dirty finish or no-contest in this one so that someone can go over without the other person having been pinned or forced to submit. I'm very much split on this one, though with my other predictions I might go with JBL.
The major title matches are tough to pick as well as Wrestlemania tradition and the likelihood of the individual scenarios in both matches don't necessarily go hand in hand. If history is anything to go by, Cena and HHH are the most likely to walk out as the champions and honestly, I could see that happening. Cena strikes me as very likely to go over in the WHC match, he's been screwed over a couple of times by Edge and Vickie Guerrero and he is the face...well, moreso than Big Show and Edge, anyway. He's my pick at this time.
Orton/HHH is a little harder, with what Orton has done it points to HHH finally getting revenge and retaining but it just feels like there's a swerve coming somewhere, possibly with Vince returning and turning heel again. That doesn't make a whole lot of sense but then neither have a few other things in this angle, that's pro wrestling for you. Orton is also incredibly over as a heel and if Cena wins the WHC match then there's a good chance they balance it out with Orton winning this one. Still, I don't know...I want to say HHH but it's tough to pick against Orton too. I think no matter which way I go on this one, the opposite will end up happening. The likelihood of a swerve and Cena winning the WHC match have me kind of leaning towards Orton. That would mean the angle would be likely to continue beyond Wrestlemania which seems plausible, so right now I'll go with Orton.
Of course, there are a few shows left before Wrestlemania and as we all know the show before the event often telegraphs the result with the person getting the last word on TV ending up taking the fall on the PPV.