10 Best Surprise WWE Returns

5. Brock Lesnar - Raw (April 2, 2012)

The day before WrestleMania XXVIII, news began circulating online that Brock Lesnar had signed a one-year contract with WWE. 

Brock had recently retired from Mixed Martial Arts following his loss to Alistair Overeem at UFC 141 and speculation had been rife that the former UFC Heavyweight Champion could be on his way back to the world of sports entertainment. 

Lesnar had left WWE under a cloud after WrestleMania XX eight years prior and hadn't exactly been kind about his stint there. 

But with MMA (mostly) behind him, Brock followed the money and signed with Vince McMahon's organisation once again. When he would actually show up on our screens, however, was unknown. 

Some believed he may get involved at 'Mania itself, possibly interfering in the John Cena vs. The Rock main event and costing The Great One the match in order to build to the rumoured Brock vs. Rock bout for next year's Showcase of the Immortals. 

He didn't, but rather showed up the night after on the post-WrestleMania Raw and attacked not The Rock, but Cena. 

We may have suspected that The Next Big Thing would show up when he did, but we didn't know for certain and the huge pop the sound of his music received let him know that the so-called WWE Universe were happy to have him back.