They have done a couple of future episodes before (e.g. Lisa's Wedding) but I like your idea. Haven't watched yesterday's episode yet - looking forward to it now!

Even though The Simpsons doesn't hold the interest it used to for me, to be honest it doesn't take much for me to watch a sitcom (I have a surprising amount of spare time on my hands when I've got important chores/work piling up) so I do still watch this every week without fail. It's basically something to stare at while I eat lunch on Mondays, so the odd times it is entertaining are nice.