Even odder for mainline figures though I suppose... I get the Bounty Hunter theme thing they're going for, and kids dig bounty hunters. But as an exclusive it makes it less kid, more adult I think.
What card it's on is pretty inconsequential to Hasbro I think... I am guessing they're considering the "Dark Rising" storm cardbacks the "main" look of the line considering it will encompass everything from Clone Wars to Legends to vehicles and so on... So I guess they figure it's better to put exclusives in that realm too. Vintage is a less mainstream target for the most part it seems. Or at least much more even than anything else is intended to be.
That's a big character too, so I don't know what he'd be able to fit on too, as cardbacks go, but probably not a vintage one.