Shin'en is probably hard at work adding extreme new vehicles and new areas of the planet Yoroppa right now. The developer can't know yet if the game sold well enough to justify a sequel (because it's been out for a day). Pong Toss achieved sufficient sales for a sequel, so it's entirely possible. Actually, if there are two games about throwing ping-pong balls into plastic cups, we're going to go ahead and say that anything is possible.
