That’s what Daniil “_Joy_Division_” Zaitsev did, anyway; he designed a 3-D model of German night interceptor He 219 as part of Gaijin’s Revenue Share Partner System, which will probably remind you quite a bit of Valve’s Dota 2 skin shop. As the studio put it,
“Exceptional work posted to War Thunder Live, the game’s own content sharing platform, may catch the developers attention and thus has a chance of being added to the game. Similarly, players that have already made progress in creating something truly impressive, like the 3D model of a vehicle, are invited to contact us directly.”
The He 219 is in the game and buyable by players as of this week’s update.
Source: Press release, official site