It’s a time machine… Why wouldn’t the Doc return Oop to Moo about a minute after he left? Is the Doc secretly looking forward to observing the wrath of Ooola? Hmmm…
Doc brings Guz and Alley to the present, and they become the Pres and Vice Pres… (not so far fetched, Obama made it, twice!) Then he uses the vast army at his disposal to dig a really big pit. Fills IT with lawyers… Ah, such a splendid muse!
Yea, just go to the Moo-vie theater!