Yeah new plastics are a must lol.
New weapons are also a must.
One idea I have is the bio-cannon that is bio-titan but have it take up two weapon slots.
Another thing that I think is going to change alot is the lictor. Here is how I see it changing:
1. He will cost less (or have better stats to justify his points)
2. His Pheromone Trail power will be more like the Astropath in that it will be a +1 and reroll on the outflank chart (that's my guess)
3. He may have that power weapon power that the brood lord has.
4. He will have some different upgades that you can give him.
Thats just what I think will happen based on how the recent dexes have been writen (It's not a rumor just my guess).