'Superfriends: Today!' Treatment

I got as far as a few pages and cast some roles for this opus in the 1990s-

Premise: It is now, and the Hall of Justice has fallen into disrepair, as the big DC heroes- Superman, Batman have left for free-agency and greener pastures. The Superfriends (the minor ones still in the league: Flash, Aquaman, Wonder Twins etc.) must hold a benefit talent show to save their home base. Cajun arch-villain Solomon Grundy threatens to spoil the proceedings with a nefarious scheme which is foiled somehow. Gleek, the Wonder twins' monkey shows his hidden musical talent by playing drinking glasses at the show.

I was thinking-
Flash- Steve Buscemi
Aquaman- Patrick Swayze
Solomon Grundy - Gary Busey
Wonder Twins - now maybe Hillary Duff and Shia Lebouef? (Too big, I know)
Gleek- ?

Alright - Let's get this rolling! Form of- an ice go-kart.