User blog comment:AdmiralPedro1stFleet/How to Explain Absence of Geth Juggernaut and Geth Hoppers/@comment-2250460-20120303000533/@comment-3228423-20120303003901

The presence of heretic geth wouldn't make that much sense in ME3, as a possible majority of players would have rewritten them to rejoin the true geth, or the possible minority wiping them out all together (I don't know what players chose which, I'm just going with players going paragon with them because they'd want to have as much of an army against the Reapers as possible). Unless the Reapers found a way to reconvert the heretics back to their side, I don't see any situation in which the geth would be enemies again.

But yes, I do hope we encounter new geth platforms, just fighting with us instead of against. :P