Hey folks, I created a spreadsheet spoiler for the first set.
Because this forum doesn't seem to support file uploads, I uploaded it to a free host.

Please let me know if there are any typos or errors.
Currently, I know that the rarities on some of the Special Action cards are incorrect. I was led to believe that there is one Special Action per hero that is Ultimate Rare only. I didn't know which ones were, so they are only listed as Rare.

Included are some Rulings/Errata for cards. As TBS announces more rulings, I will update accordingly.

http://www.badongo.com/file/9776313

Thanks for doing this!

I downloaded and took a quick look. There were a few typos.

s/opponenet/opponent/
s/Hurrican/Hurricane/
s/Spider-mMan/Spider-Man/

The width of the Power column did not allow Hulk 100 to display for me so I changed to 0.28. (I'm using Open Office 2.4 FWIW.)

When I get the chance I'll go through and verify the actual text and rarities with my cards. I have most but not all.

EDIT: Okay I went ahead and looked at rarity on some of my cards tonight...

My 3 MUB-132 Strength In Numbers are Common not Rare.
My 2 MUB-135 Mutant Master are Common not Rare.

Thanks for the feedback. Typos fixed. I'm not going to upload a new version until those rarities (that I know are wrong) are fixed.

I edited my post to include the only two rarity problems I found. I'm currently missing 46 of the 165 cards so there are quite a few I could not check.

Thank you. I messed up on those.

Seems odd for Special Actions to be common.

Does each hero have 1 common, 1 rare, and 1 ultimate rare Special Action card?

There does not appear to be any pattern to it. The only hero I have three special actions for is the Thing and for me all three are Rare.
MUB-145 It's Clobberin' Time
MUB-146 Rock Always Wins
MUB-147 Show of Strength
On the other hand I definitely have several Special Action that are common.
MUB-126 Hulk SMASH!
MUB-132 Strength in Numbers
MUB-135 Mutant Master
MUB-137 Blink
MUB-141 Webbed Up
MUB-152 Full Bleed
So it appears somewhat random. I'm not sure if there are any Ultimate Rare Special Actions. I don't have any.