Certainly.
Already NATO has a very strong relationship with both Sweden and Finland even though they're not allies. There's a close relationship, and one would argue that it's gotten closer in the current context, but although there is talk out there in the ether of Sweden and Finland joining NATO, that's a decision for those governments to make. My understanding is that it's not a decision they are close to making. NATO has an open-door policy. The alliance will look at any and all applications from European states to join the alliance, but that's not something that's happening right now. Anything beyond that in terms of the defence of the high north and defence of the Arctic would be speculative.