#2 Finn Balor could attack Triple H and start a feud with his NXT mentor

From 2014 until his main roster debut in mid-2016, Finn Balor was a mainstay in the WWE's NXT brand, where, under the guidance of NXT founding father Paul "Triple H" Levesque, Balor scaled great heights of success.
Now, Balor is rumored to be challenging Bobby Lashley for the latter's WWE Intercontinental Championship at WrestleMania 35. Also on the 'Mania card, Triple H will face old "frenemy" Dave Batista in a No Holds Barred matchup. The writing is on the wall, and it wouldn't be surprising in the least to see Balor interfere in Triple H's match with Batista.
While Batista is likely to either retire from professional wrestling altogether or feud with someone else after WrestleMania 35; Balor attacking and costing Triple H his match at 'Mania, could lead to a full-blown rivalry between the student and his mentor!
Both Balor and Triple H have otherworldly ring psychology, and will definitely make the most out of the real-life student-mentor angle, when engaging in their on-screen feud...However, what's essential here, is for Balor to attack Triple H in the former's "Demon" avatar, and utterly obliterate "The Game" before embarking on a long-term rivalry...