That may have been hinted by the trailer. If they are going to make the first episode focused on Midgar there's a lot of chance of fleshing up their back stories.

Being Playstation exclusive

First one wasn't PlayStation exclusive though

I wouldn't mind if not watching the entire Knights of the Rounds summon and give us the option to skip all summon scenes.

I want to know how Summons will play out in the remake. :D

Same here.  Maybe the same route as FFXV?

Oh... not a complain thread.

I would like if they took some inspiration from Xenoblade chronicles.

I enjoy that combat system, and skill tree's & various skills (but limited skill slots) so you can customise how you want to play the game.

If they had that, ontop of the materia system..... *mindblown gif here*

If I would put FFXV's Summon approach I would describe it as Summons having a pseudo-real time interaction in the moment.

Besides that one, that leaves the following options:

1) a simple video of the summon attacking

2) a summon appears and stands while attacking

3) a summon appears and joins your party

4) a summon appears and you are allowed to control it

5) options 2,3&4 but the party member who casts the summon disappears for the duration of the summon

What else am I missing here?

Sounds like you got the gist of it all.  I'd probably prefer a simple video with some button interactions that determines the strength of your summon's attack (similar summons in FF8 i forget which).  I prefer to not take the control away from the actual party to control a summon.

That would be a throwback but adds interaction with a cinematic summon indeed.