So here are a list of my thoughts to get everyone on the same page:
1) Marionette was, by far, some of the best content we got during season one of the living world. Everyone I have talked to agrees to this which means that chances are it’s widely popular.
2) Season One was not permanent content which is all the
((((
3) Season Two content will be re-playable, but in a way that makes me suspect that it is all instances eg. 1-5 players.
4) Marionette is a map lvl event.
5) Asking for Marionette again in season two may result in a smaller and sadder experience.
6) Guilds are able to face Teq and Triple with influence. 
D
7) Teq and Triple are both map level boss fights.
8) Marionette could spawn with that mechanic!!
To put it in a more cohesive set of thoughts…
Since Marionette was and is still very popular as content, the Devs may want to consider bringing it back as guild specific re-playable content. Guilds can purchase it to unlock it (maybe via gems who knows) and then spend influence to spawn it.
It would be playing off your new “revisit the past” and replay content that you are bringing in with season two. It would also actually give people hope that some season two content will be in world raid styles still by using the guild mega event spawn. Also it would give the players something unexpected and like a present in the form of your new content structure, meaning that it would add to the positive experience for many players.
You wouldn’t need to find a place for it on your timer, you can leave your blank space for new content I suspect you left it blank for. It would be a guild only spawn-able mega boss, which would add prestige to that guild ability opposed to it being a minor convenience thing (Oh we don’t want to wait for natural spawn).
Also its so popular I’m willing to bet you can make a small profit off of doing this.
For clarification: I am being selfish here, I want this content back because I well and truly enjoyed it. Unlike many bosses we have atm it wasn’t too hard in the punishing way, or too simple. It required strategy, and a variety of skill play to be able to complete. It wasn’t “zerk or die”, it was “Know your lane”.
You also already have the map carved out for her, why on earth should you waste that?
Thanks and I am hopeful!