#4 Demon King vs Undertaker
Another feud which is highly unlikely to ever take place, but if in any realm something like this was possible, it would have received top billing. On one side, you would have had Finn Balor, the Demon King, a phenomenal athlete in one of the craziest personas in wrestling. fighting as an alter ego where he walks differently, does things differently and more importantly keeps everyone spellbound.
And on the other side, we have the Phenom, the unstoppable force, one half of the Brothers of Destruction, the Undertaker. The character that was able to instill fear in everyone through his gimmick, which was both scary and dominating.
If it was possible, it would have been great to have these two strange gimmicks weigh up against each other, but with the current physical state of Undertaker, it looks highly unlikely that he would get involved in such a feud.
These were my 4 dream feuds which are highly unlikely to happen, what are yours? Do comment and let me know, Thanks.