The Titan has no chance of winning. But now here's the stupid part, he doesn't want to, that blast will break the gate which is the wall's weak point that the Colossal Titan always aims for. Now the question really is if he can disappear before the attack reaches him or if not, if the attack hits his weak point. Fighting titans is so unsatisfying and stressful. There should be more PTSD soldiers around in the show.
uuuuumm...goku-san...just to remind you that its the colossal titan which is your enemy...not the planet...just letting you know...you know so you don't..like...blow up the planet ^;_'^