I took a field job for 2 weeks and just came back to civilisation and this happened......
Coming from a Military Intelligence background. Here are my advice.
1.) Making a new forum
I think the important thing is to know what or why or how this forum is being closed (or as much as I can gathered, banned) Then you need to avert the same thing happened before. What layout or which template you use is secondary, what you should concern is to not get into this again. That way you either would be a tool for whoever forcing this forum to shut down or you are going to do this all over again in a few year
On the other hand, you need to have an anonymous group that in charge of the forum, that's how it cannot be influenced. I mean you won't see an actual person that listed as the director of Wikileak, a known management is always prone to be influenced, most of these forum was controlled by a shell entity (usually more than one) and an unknown group that control the shell company that control a shell company that control the website, so when whoever or whatever trying to influence you, they can't because all they can find is the shell entity.
Another issue for equal or even overseas ownership is not going to be enough for the future of that forum, if whoever is after you and they will get to you. The fact that I can pinpoint
@Hyde and
@waz as the owner of the new forum itself is a bad start, which mean that is the angle I am going with. You need a way for people to contribute anonymously, it's different between a moderator and an administrator, you need to be in the open for the former and you need to be in the shadow in the latter so that you cannot be influenced.
2.) About quality of the forum.
Trolls are ALWAYS going to be a part of internet culture. It's impossible to eliminate trolling, but you can deter it. Strict moderation is a must, on top of that, you need to encourage people for contributing, poster who process knowledge should be valued, and don't make the same mistake this forum made
And finally, as for me, I am not going to be any part of new structure, I wasn't really active on this forum now, and I most likely will not be in the new forum or on any discord, I am 40 something years old, unlike when I first join back in 2012, a lot of circumstance has changed for me, now I am just going to get down with my job (actual job) and get pay to live thru each week

So good luck on your further adventures.
I will see you when I see you all.
Nah man, I am done with forum, I wasn't on that much up here, not going to partake on the new forum.
If you are keen,
@LeGenD have my private contact detail, you can ask him and we can keep in touch.