So, after he tried to propose to her in this last movie, it was clear Shenzi was pretty pissed off. But---she got sucked down the hole before she could really give him what he deserved for it.
Perhaps it's luck that the two didn't end up coming face to face in LK2, seeing as it logically would have resulted in some sort of reference to said proposal---which the crew didn't know about at the time LK2 was made, of course.
But assume they were to encounter each other again. Would Shenzi just try to eat him, or would she give him a long lecture on how "wrong" what he did was? (Personally I have no thing against interspecies romance...)
And how would Timon react? Would he be cowardly like he was in LK1? (""PLEASE don't eat me...") or would he stand up for himself?
It makes a really good idea for a hypothetical LK 4, but seeing the likelyhood of that...