We’ve yet to have heard anything regarding Juggernaut mode. Regicide has a theme very similar to that of Juggernaut’s which is to kill the player visible to everyone on the map. Main difference being that Regicide is an FFA mode and Jug is a team mode. But still, do you think Jug will still be in the game regardless of the similar theme it shares with Regicide?
Another thing I’d like to note, Jug wasn’t very popular in Reach or Halo 3 due to its rare appearances in playlists, so a fresh new mode to replace it would make sense.
We also haven’t heard anything about Assault, so by that logic…
No, Regicide is not replacing Juggernaut.
We haven’t seen any non-Infinity Slayer gameplay either, but it isn’t replacing regular Team Slayer.
They have only just recently confirmed Oddball being in, give it time and we will hear a lot more about all the game modes.
Regicide is a mode we can play in Reach (maybe Halo 3 as well). The only difference is that they’re announcing it as an official gametype.
Juggernaut wasn’t popular because it’s currently glitched and we can’t make many variations of it. You would think this would be a priority to fix a broken glitch that makes something unplayable in the TU but nooooo, people wanted their ZB.