Capcom has announced the final character to be added to Street Fighter V's roster is Luke, a new challenger and according to the official Capcom account "a key player in the future of the series." Which probably indicates that Luke is a key figure for the eventual Street Fighter 6 (Capcom has this habit of showcasing one character in particular as the 'core' of certain entries: Alex in Street Fighter III, Ryu for Street Fighter IV's reinvention, and Necalli for Street Fighter V, RIP Necalli). slot
Luke has a punch-focused fighting style and looks like something of a cross between a boxer and MMA fighter. He also has more than a few similarities to one of Street Fighter's golden oldies, Guile: blonde hair, dogtags, and as you'll see above, projectiles that bear a passing resemblance to sonic booms. Finally, Luke mentions his father in the trailer, and has a rather large upper body tattoo of the stars and stripes so... yeah. Looks like Guile (or Nash) has a son.