Rumored Wrestlemania Matches 1

The countdown clock for Wrestlemania has already begun and with the show on the first Sunday of April this year that gives guys like me even more time to speculate and talk about what matches may or may not be featured on the card this year. Since this is the first time I am doing this I will keep things simple and pick one match we know will be happening but hasn't been announced yet and another that might happen or could happen. 

One of the various matches that at this point is almost confirmed is the third match in the Goldberg vs Brock Lesnar feud. The feud that kicked off around the Royal Rumble almost 13 years ago continuing now over a decade later with the feud culminating in a Wrestlemania match to end it all. Back at Survivor Series 2015 Goldberg return for his first match in 12 years and downright destroyed Brock Lesnar in less than two minutes shocking the world and cracking two of Brock's ribs. Now they are on a collision course to face one more time at Wrestlemania. 

A match that hasn't even been rumored as of yet but one I think we could see and I would like to see is a multi-man match of some kind for the United States Championship. The reason I would like to see is because it would mix things up from what we have seen in recent years with the IC Title in a multi-man match. Also this isn't a shot at Roman Reigns but instead at WWE creative for their poor booking in recent months with the United States title. The point of a multi person match would allow a variety of possibilities for the finish and feuds following the match. Who should be in the match well?
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Six Man Match for the United States title: 
(c) Chris Jerich0 vs Cesaro vs Kofi Kingston vs Big E vs Rich Swann vs Sheamus