#1 If not now, this clash may never happen
Brock Lesnar is just over 40, and he could be with WWE for many more years to come.
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However, two months ago, in January 2019, Batista turned 50. While many WWE Superstars have wrestled regularly even after turning 50, we cannot say the same for Batista. Batista is still a huge Hollywood star and will have to go back to Hollywood eventually. Thus, many WWE fans speculate Batista's current run to be his last with the company as an in-ring worker.
Thus the time constraint is very tight when it comes to Batista. If WWE officials are planning to pull the trigger on the potential dream match between Brock Lesnar and Batista, they have to do it now - in 2019. Since Batista's WrestleMania 35 opponent is speculated to be Triple H, we may have to wait till SummerSlam to see the showdown between the two behemoths.