I guess they'll show off the other Titan classes?
According to their descriptions this should be the "high explosives" one
there's a Main Battle Titan armed with an XO-16 battle rifle and "defensive vortex blocker" (that Jedi-ish bullet catching power from the trailers), a Heavy Weapons Titan equipped with a 40mm cannon and an electrical smoke screen, and a High Explosives Titan armed with a launcher that fires multiple rockets.