well not auto go, like if u chose your skills in the first area (3 skills) it teleports you to the next area where u choose your ulti. when ulti chosen, u got auto-tele to your base.
is that possible? if not then just make them auto-go like you say without the possibility to stop but i assume that the first idea i mention is much better because
it could get really messy if 2-3 heroes got picked all skills at once and all the heroes try to go to the same spot at once (i could see ppl going - WTF move ur ass %$^!)