I suggested it years ago when Rifftrax just started, I'll do it again because of the AMA on Reddit.

In the future, not to far from now... Earth is encased in a power shield. John C. McGinley is keeping it up to protect against the eeeeevil radiation that now gets through our atmosphere, due to GLOBAL WARMING. Suddenly, Conner MacLeod of the Clan MacLeod is watching an opera! Wow... He really let himself go after gaining mortality... after the opera, he gets accosted! By Aliens! Conner is also an alien?? After killing one of his assailants he, like the mighty He-Man, shouts "I HAVE THE POWER" and gains his nice fit Christopher Lampert body back? That's weird. Apparently only he can take the shield down, to reveal that we again have an atmosphere!

Then Sean Conner and Michael Ironsides appear for some... plot I guess?

Its an aggressively bad movie, and this time, doesn't have Freddie Mercury's music to calm the soul!

The kicker: Sean Connery uses the magic of Amazing Grace being played by a GLOWING BALL OF ENERGY SUMMONED FROM HIS HAND to stop a Total Recall-esque drill/spinning blade descending from the top of a tunnel.