i think that we need some giant transporter that can transport a huge army..maybe 100+ t1 tanks in 1 swoop..this is a lategame unit that can be built..but it is far more expensiver than lets say a interplanetary transport that costs 12k mass. so if the enemy commander escapes the planet..why not chase him when you have completely taken over the planet and build a super transporter...mega expensive as said earlier. so that the enemy commander cannot turtle up on a single planet and crush every landing attempt that you try to do with 1 enginer at a time or your acu. it would be an extremely fun unit to use...if you have seen the intro to supcom..that big cybran transport ship could be something to refer too also some sort of smaller transport for just using on the planets itself would be nice to have added. tanks traveling around the globe takes some time unfortunately, would be cool if it could be shortened
We'll wait and see how the unit cannon ends up working, potentially it could end up being able to fire an effectively endless stream of units between worlds, para dropping them in (as seen in PA's concept trailer) a normal air transport would be excellent though.
Some kind of unit to land on other planets without having moons or astroids around will be needed... I mean, lets say you have two planets but both are very far away from eachother, too far for nukes to pass the distance (so no inter-planetary nuclear war either) and you got no moons or asteroids that you can use as a huge dropship. How do you handle that? What do you do? You will need some kind of spaceship to carry a landing army to the enemy, preferably one that can nuke/bomb/emp the LZ so your troops can land semi-safely. Perhaps even a mobile anti nuke so your landing bots aren't just vaporized by their nukes.
From what I've read and understand, we should be getting an air transport, unit cannon, and a teleportation system. Each being more capable than the previous as well as more expensive. The unit cannon I especially look forward to as it will be a unique tool in spreading your forces EDIT: I should note the air transport cannon go between planets (at least I assume this)