I'm sitting here thinking: future Gohan wouldn't have fought Frieza...? Like, why would Gohan do that? In both timelines, Goku and friends survive mecha- Frieza and king cold regardless if trunks shows up? Future Gohan wouldn't meet the z warriors the same way ftrunks would imo. He wouldn't need to. He'd probably meet Goku alone. Or maybe he'd just meet his younger self instead... There'd be no need as Goku wouldve probably instant transmission'd to earth when he sensed frieza's energy anyway (he claims he could've done this but he sensed trunks absolutely destroying king cold/Frieza). FGohan would know how the fight played out since he was actually present when Frieza arrived.
Tbh, I'm not even sure why ftrunks did that anyway. He was absolutely on a warpath I guess. He should have known they didn't need his help there. Only after. He fiddled with the timeline too much.