The problem I see is a similar problem the Wii had. Mid-tier games without the umbrella games to build support that allows the mid-tier games to sell. I don't think anyone would try to postulate that PSP 1/2 would've sold anywhere near that much without Monster Hunter building the exact base there in the first place. The Phantasy Star Online type playing had been an < 200K series in the previous generation on consoles. Now, yes, I'm sure a lot of people went to PSVita expecting to have more of the MH PSP type experience, so I think it'll probably be > 200K LTD. However, it shouldn't approach the sales it got on PSP.
More support is good for Vita, but just having some support is not enough, if it's not the right support, as Wii saw.