#2. A world title win at WrestleMania
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Had the Roman Reigns situation still played out and Ambrose didn't turn heel, there's a very high chance that he would have been pencilled in to win the Royal Rumble and challenge for the Universal Championship at WrestleMania.
Now, we all know what happened the last time Brock Lesnar and Dean Ambrose met at the Showcase of the Immortals. It was supposed to be a big street fight that could have made Ambrose an even bigger star, but due to Lesnar not wanting to take any major bumps (as he had a UFC fight prepared 4 months later), he refused to do anything that Ambrose pitched and it turned out to be a relatively flat 12-minute match with a terrible finish.
However, can you imagine if Dean Ambrose faced Brock Lesnar again at WrestleMania 35 and got his revenge? It would have guaranteed that he would sign another contract.
Plus, it would be his second world title.