^picture
Could we see a scaled up version of the Lich from Halo 4? Here's some info about it for those who don't remember.
"The Covenant's largest airborne deployment platform, the Lich boasts heavy armament and is capable of mass deployments of up to forty soldiers. Because of this, UNSC encounters with Liches have almost always resulted in total destruction of the UNSC ground forces, resulting in a lack of available information on the craft.[1] Like smaller Covenant dropships, the Lich is spaceworthy. It is also capable of traveling through slipspace, though presumably it cannot do so under its own power."
The Lich's abilities:
"The Covenant remnant deployed multiple Liches during their initial foray on the Forerunner shield world Requiem in 2557. After theUNSC Infinity's Marine and SPARTAN complement disabled an array of Forerunner particle cannons, they were attacked by a Lich, which was then noted as being unidentified.[3] The "Lich" moniker may have been applied after this attack.[note 1] The deployment platform quickly disabled a Mammoth's Magnetic Accelerator Cannon and dropped off troops. Spartan John-117 and a team of SPARTAN-IVs boarded the craft and destroyed it."
I think it'd make a great support ship with it's ability to disable enemy weapons. Although I imagine it'd have to come with the Rebellion release, due to it being deployed after the war (like the Infinity). Again, the Lich is not quite the size of a frigate, so it may have to be scaled up in size as well.
Source: http://www.halopedia...ort/Ultra_Heavy