Got word from Ben on the forums that one sign-in for multiple devices (for those who paid; you paid, didn't you?) is coming real soon. Exactly when hasn't been confirmed.

Also, not exactly of which has been confirmed, but some of these things below is being considered according to Ben; some stuff happening sooner than others. The list below isn't a hard list, and some of these things may not even happen at all. Take it with a grain of salt.

• Control Points ("1 thru Infinite Point Domination" and/or "3 thru 9 Point Push")
  
• Grates/Fences (blocks you can't go through but projectiles can)
  
• Time Limit option
  
• Limited Lives option (and with that, LMS)
  
• Spectating