The justices already have their world views on gun rights. 4 oppose them in principle. They do not exist.
One strongly supports them (Thomas). The others are wishy-washy when it comes to actually changing current laws to expand carry, limit state bans and the like. They were OK with theoretical blather like Heller and McD for gun rights, but when it comes to now getting more guns and more types of guns out there in use by knocking down state regs - they are not there at all. Gorsuch, even he is an advocate as strong as Scalia - which is unknown, does not change this balance.
As far as briefs and opinions - I have said before that they all have a world view on guns, they then mine past decisions, opinions, etc. to support their position. They do not have views changed by new 'scholarship' or reasoning. They tell their clerks to write for what they know they want to do.
The idea that SCOTUS will void state bans and mandate all states become shall issue is a pipe dream with the current court and probably for the reasonable future courts.
It's all 'reasonable restrictions'. The peasants can have shotgun and a revolver at home at best for some of them. For the others, not even that.