#2 DDP wishes he wasn't involved
Rey Mysterio may not have been allowed to join the Invasion, but one man who certainly regrets taking part is Diamond Dallas Page.
A three-time WCW World Champion, DDP was one of the company's biggest stars, with fans appreciating his natural personality and charisma.
Debuting in the WWE, the company made Page the stalker of The Undertaker's wife Sara, which led to the Yoga instructor getting his butt handed to him by the Deadman for months.
Since the Invasion ended, Page has gone on record saying how he regrets taking part and felt it left a black mark on his career.
A former three-time World Champion, having Page as the stalker killed any possibility of being a world champion again, and he left the WWE the next year.