Bots/AI for non-full servers + Single-player/Co-op Bots mode for the Training menu.

This would be great for the game, Similar to POP One (game), there could be a Single-player/Co-op with Bots to play against for those who don't want to play with/against real people. I think it would make the game better for those who prefer to play against only bots. For the servers part, have them fill with bots when the server isn't fully filled. when someone (real player) joins, the player will replace the bot (similar to when a Player Joins in TF2 , it replaces the bot with the player).