My time line might be a bit off, but Dan Akroyd was probably working in the 700th Ghostbusters III script when EGB came out. I don't really follow the legalese of the whole thing, but there was also something with EGB in regards to Sony (Columbia) owning the rights to make a new animated series but NOT the rights to the art designs from RGB (which CMW eluded to) so it ended up looking exactly like the MIB cartoon (which I'm sure was a cost cutting issue as well). I think I read one episode has a Dr. Venkman statue in a background but, like a WWF scratch logo, is blurred.
There's probably a whole bunch of things we could say that are really obvious and some that aren't so much, but off the top of my head:
"Vacation" - I actually JUST saw the first two Vacation films this weekend but I've been enjoying Christmas Vacation annually since 2000. I don't really think we needed a Vegas Vacation 8 years later, but that film is probably gold compared to the made for TV "Christmas Vacation 2" sequel.
Speaking of made for TV sequels, what the hell was the deal with the 3rd Brady Bunch movie? Yeah, I think the first film is awesome and funny (yeah, I'll admit it) and the second one is ok, but did they need to make a 3rd one for TV years after the 1st movie was such a surprise hit? No. Same goes for the 3rd Addams Family (direct to video) film they made, which I guess was the basis for a new TV show that didn't last very long.
More obvious choices would be Rocky VI or the upcoming (I think) Jurassic Park IV. JP3 was not really a welcome addition either.