Unfortunately the re-release of Marvel vs. Capcom 2 will not have double blind select, Capcom's Rey Jimenez stated on the Unity Boards.
Since MvC2 is using the same netcode as HD Remix does that mean when selecting characters online in the character screen will be double blind like HD remixt? — Diego power
JimmyRey: Actually, the double-blind select in HD Remix is not a feature of the netcode and something that was written into the UI code. In HD Remix, not only was the UI redrawn, but it was also highly tweaked, and this allowed us to put in the blind select.
Unfortunately, redrawing and tweaking the UI was not within the scope of the MvC2 project. Believe me, if we could've done it, we would've. We did it in HD Remix and we think it's a great feature, but MvC2 was just made under different parameters that don't allow for that kind of tweaking.