Forum member wiiwhitey has found pics showing the upcoming Series 5 Mongoose Sets. The sets are:
Exodus Mongoose w/ ODST Jetpack Trooper: This updated version reflects the character’s appearance in the final game, including the distinctive ODST chestplate, shoulders, and wrists. The Mongoose also has Battle Damage.
Rocket Race Mongoose w/ Blue EOD Spartan: Includes Rocket Launcher and Spartan consists of EOD helmet, blue visor, Hazop and CQC shoulders, Assault/Commando chest & Grenadier knee guards.