They use manatee for sleepovers, so letting people walk thru there all night likely isn't going to affect the animals. But it has the same problem as Kraken, being in the middle of an area of the park it would be easier to cut off.
On the flip side, if their field trip program is close to recovered by this Fall. they may need that space free of Halloween decor for sleepovers.
Same, I think it still has a following, and is truly eye-catching from I-Drive when it runs after dark. I think it would give the event kinetic energy. Maybe, and this is pure brainstorming, use that Antarctica corridor as an E-ticket scare zone leading to and from Kraken, to sort of hide the fact it's a dead end.