video game winrate question (random teams)

this is not a homework question.

in a video game such as World of Tanks, with 2 random teams playing against each other, over the course of many battles, what range might the winrates be?

if you ignore every other aspect of the game such as equipment, etc, and just look at player skill, should the winrate be 50%?

- random teams of 15 vs 15 (every game is a random team)
- over the course of 30,000 or more battles for a given player

what might the winrate be for a given player, assuming everything else is the same?