This is the first info I've seen since it was announced.
"It's going to be very true to the roots of the brand, of R.B.I. Baseball," said Jamie Leece, vice president of games for MLB Advanced Media, in a phone interview with Polygon earlier this week. "It will be fast-paced; games can be played in under 20 minutes. From a user control standpoint, fans will find the controls to be 'classic,' reminiscent of the two-button controls from games of that generation."
Along with the classic two-button control system, the game will feature a retro aesthetic. Each MLB team will feature 16 real players, but every player will be represented by one of three basic character models: average-sized guy, slugger, or little guy.
The game will be released on all current and next-gen consoles, as well as mobile devices, in April.