#2 DX Invasion
This one is fun and still popping up in popular wrestling culture to this day. In fact, if you had never seen the DX Invasion before and are only familiar with the Bullet Club invasion, then you're in for a real treat but it might be strange.
It could be like watching episodes 1-3 of Star Wars before you see episodes 4-6. It might make sense when it comes to story, but much of the context could be lost.
But when DX showed up to a taping of WCW Nitro in 1998, there was lots of fun to be had, but it was still a very serious matter.
Company lines were being drawn and DX wanted to declare war on WCW.
It's ironic that presently the Bullet Club is using many of the same tactics and attitude that ended up winning the Monday Night Wars for WWE. Only they need to be careful that their actions aren't deemed too sweet for the competition.