I think probably the other golems are lost for good; Sizemore appears to be out of juice. He couldn't even replace one of the arms on this particular heavy metal golem. If he doesn't repair other fallen golems before GK's next turn, presumably they disappear? That makes this fight as close as it could be; the last hp of the warlords against Sizemore's last bit of magical energy.

We don't know if he can seal outside entrances with the remaining dregs of his power, or if he'll use minions (gobwins or golems from elsewhere) to do the job.