#4 The men's team is not united
The team for the traditional 5-on-5 Survivor Series match comprises of volatile elements. Dolph Ziggler and Drew McIntyre may see eye to eye, but Finn Balor and Braun Strowman certainly don't. And who even knows what Bobby Lashley is thinking at any point in time, right? It would not make sense to see them united.
Yes, having heels and faces team up would make sense ahead of Survivor Series. But it would certainly affect the long-term storytelling and ruin plots, in the process. Bear in mind that Survivor Series is just a pit stop in the never-ending drama that is known as sports entertainment.
In a way, I was actually glad that the invasion didn't happen, at least for the men's team. It could have done more harm than good.