Yes, the current writer did have vague plans to write out the siege of the Mice Wearing Hats, and then a resolution of the Palace of Infinity story-arc, within this third topic, in order to bring the Round Robin to something vaguely resembling a conclusion (assuming Rowan and Andrusi were OK with this, and no one else jumped back in).
This story is nearly finished...I think, and we've come so far that leaving it as is just doesn't feel right.