Dude I don't know. You're stressing me out. I love you... What? Anyways I think in GOW 4 kratos should just come back to life somehow. Maybe the ghost of his daughter awakens him or something with that song she plays, I don't know.
Deadly force is authorized! He he he.... That's all I needed to hear. LIVE FOR JESUS, OUR HEAVENLY FATHER!
>new enemies More than I care to list right now. Same for returning favorites.
>new weapon styles >styles This aside, same notation.
>magical abilities Soul Summons of GoWIII done right. Souls of GoW1, but not OP (nor **bleep** weak). Petrification of GoWII (EH) further honed. A 'mind trick' to control foes (as done by Starkiller in SWFU2). I'm not too focused on 'new' spells, so much as making the old ones better. The dropped ice spell of GoWII could be interesting. A proper 'time slow' as well. More evasion and parry options, maybe. Getting more into item territory with this talk though. Relics too.
>new bosses As with earlier notes.
>specific ideas I'll wait to see what GoW:A does before continuing down this path. I've done this many times over the years.