I think it really comes down to only 2 possible scenarios:
1 ) Donald J. Trump will be declared winner of the 2020 Election and a massive party will break out on the National Mall.
or
2 ) Joe Biden will be fraudulently installed as President in violation of the US Constitution, triggering an immediate intervention by the US Military acting under declaration of the Insurrection Act and with the full support of 1.5 - 2 Million Patriots in attendance.
I mean at this point is there any "Pro Biden" people? They just didn't want Trump. I can't see more then a handful of democrats who are just Biden lovers... specially ones that are willing to mix it up with angry pissed off Trump supporters.
ANTIFA and BLM will probably be there, but considering they tuck tail and run when faced with any opposition that is real... I don't see them as a threat.
What I worry about is some type of false flag attack.