ok. here's my reasoning why i won't be adding any drop ships of any kind.

Take a look from the beginning of the battle sequence. First we see a shot of the empty landscape:

a little later we see the same shot but with something added:

Now look where your eye is drawn to. The small dots.

Now add the dropship:

Now see where your eye is drawn too, especially if this shot was moving. it isn't the small dots any more. You are now focusing on the larger vessel. Chances are because its a quick shot you wouldn't even look at the At-At's at all but instead you would be too focused on the leaving drop ship. IMHO this spoils the shot. You need to be focusing on the small dots on the Horizon or the binocular reveal just doesn't have the same impact. Plus, if you look at the whole scene the rebels are only just getting into the trenches to prepare for the battle when they appear on the horizon. If you add any dropships then surely they would have seen the ships and get ready a lot earlier. So, sorry, but there will not be any form of dropships added to ESB:R