Now that the main series seems to be well and truly on the road to becoming more action-orientated, in terms of the underlying combat mechanics, then I don't envision FFVII:Remake incorporating a turn-based battle schema. It's not that turn-based combat is a devolution of real-time combat, but if they're trying to replicate a cinematic experience, a la Advent Children, then keeping the encounters turn-based would just be a bizarre development and pacing choice.
Given current gaming culture, especially on consoles, to develop games to be as sensory overloading as possible; I'd be extremely surprised if they did stick to anything resembling the original game. I suppose the clue is in the choice of phrasing. "Dramatic changes" tends to sway towards an entirely new direction. I'm all for it to be honest. Although I am sure I am in the minority with this opinion...I wouldn't even mind if you only had control over Cloud. But that, by enlarge, is not in the spirit of jRPG.