It's going to bomb but to be fair it's a late port and Sony made the PS3 version free to PS+ members so I don't think they really care much about it. I suspect the game is just a bone to throw to fanboys so that they can claim they're making an effort with Vita..

Minimum lifetime: 450,000
Maximum lifetime: 1 million
Realistic lifetime: 725,000

I don't think it'll do that great, but it could pass 500,000 I suppose? It is a big name, but who knows.

200K

Idk I am inclined to believe the "Not past 100K." Then again it is probably just a downport of the PC version so I doubt it cost almost anything to make...

More than likely Gearbox already got paid for Sony to license it so Sony probably owns the rights to the Vita version.  Whether it sells 100,000 copies or 0 copies, Gearbox probably already made all the money they're going to.  If correct, selling 0 copies will only hurt Sony, not Gearbox.

150k-ish.

Like others have said already. Its free on ps+. so why would many people buy it?

I really don't see it shifting much at all. Given the amount of marketing that the exclusive PSV releases were given last year (Soul Sacrifice, Tearaway, Killzon Merc etc) I don't expect Sony to even bother telling anyone it was out either.

120k being generous. may possibly enter the top 20 on release week but I don't expect it doing much at all.

I would not be surprised if Sony is the one that pays for the entire thing to be made

120k LT.. It had been free for plus members and is it would 2 years old port for full price when it will be released.