I can try to provide some suggestions on how to handle the merges if it’s not too late to change what’s going on behind the scenes.
To preface: I’m not very knowledgeable in how companies/territories are ran. Just a random dude with random suggestions.
Option one: War’s between existing province owners.
In this scenario, companies that own the same territory on the two servers will duke it out amongst themselves to keep control of their territory. I however can’t say how it can be handled. Possible, start off by disabling the two servers wars/invasions a few days prior to merging. Once the players are merged, you could immediately throw provinces into conflict with the two owning companies. On the topic of who defends/attacks, you could possibly have both companies compete in faction missions to collect the most favor for their choice. Also there’s a possibility of a best of 3 war, alternating who attacks/defends.
With this option, the whole process seems overly complicated but pretty cool in my opinion. However I don’t think the current state of the player base can holdout for this kind of event to be planned out and implemented. Also I imagine it would probably take manual hand in every scenario and not easily automated.
Option 2: Outpost rush deciding.
An easier way implementing something but is also fair for both companies. I’m not sure if you can set up OR for both companies cross server or if they would have to be merged first. Both companies can compete in a first to two or three series to decide the ownership of a territory using only members in their roster.
This is the most “fair” way but does not take advantage of existing fort upgrades earned by the companies. Any bias the map may have is negligible and can be the starting side can be alternated if there are multiple matches.
Option:3 Settlement scoring system
This one is interesting between servers that are roughly the same size. Have a contest that compares the two server’s towns/fort upgrades. This would require the help of other players of the same server to boost their favorite company/town(s) to compete with the other server’s by a deadline. If your company loses a town this way, you could possibly refund them based on the upgrades achieved with gold (just an idea).
This way, manually choosing what town stays and goes based on their performance is the only thing to moderate. Also, this will show if a server supports a given owner/territory or not. However, well established and organized companies would have an advantage but in that case they probably deserve the town over a company that is less than so.
Some closing thoughts:
You honestly can turn server migration into merging/diverging into a regular event/mechanic based on player population size. If the player base goes up, you can give an option to newer or power hungry companies migrate to a “New World” with a fresh slate. Starting the cycle all over again. I think this game could use some cross server interaction, especially in cases where one faction owns the entire map. Even if it’s just a small “raid/Player invasion” event. Whatever the case is, I hope you guys can come to a conclusion that satisfies as many people as possible.