Additionally it depends on how successful steamboxes will be. And how many steambox owners will buy this game.
It'll be available on steam, which means it'll be available on any steambox. There will be a reference design that Valve sponsors, but it won't be the only steambox. I plan to build a steambox to sell at my shop.
I know I'll be very grateful to SEGA if they can release Sonic Adventure DX on Linux (with the complete JP voices!).
And while we're at it, maybe someone can try to convince Square Enix to release the recently-launched Final Fantasy 14 Reboot on Linux as well...but considering how that game is so graphically intense that it can bring the most powerful graphics cards to their knees, i think i'm asking for the sky here.
A football-related game is the wrong type of game to bring to Linux.
They ought to bring some geeky sci-fi or fantasy game instead.
The thing is that this port should not have cost plenty to Sega : the 3D engine is minimalist and the game is mostly made of menus. Still, if that's successful enough, Sega may port more.