Unfortunately, companies can easily ask for takedowns of anything with no repercussions and many people don't have the money to fight anything in court (plus the companies have teams of lawyers) and are scared even by the thought. If this project gets too big (especially close to anything planned by the parent company for a new DotT release) I don't doubt that it'll be seen and taken down.
Luckily, most fan projects are removed because of they're stupidly-low low-hanging-fruit... by which I mean they use trademarked names/logos.
This project doesn't do that so likely isn't going to get removed by a simple bot (one that just searches for keywords or searches for a copy-paste of an entire logo) but when it comes to more advanced AI for image recognition (especially with neural networks) it becomes more likely that they could detect it early. Although the AI wouldn't even really need to be that smart, as the logo (particularly the 'of the tentacle') is extremely close even if it's not a 1:1 copy. If anyone is using or will use AI for stamping out anything remotely resembling infringement, it'd be Disney (who owns LucasArts and thus DotT).
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Even if you think to yourself "MY corporation wouldn't do that to fans, they're cool!" remember that they want money, don't always have fans' best interests in mind, and can end years of work with less effort than a finger snap (in relation to the collective of the organization). Just because you (possibly) can, doesn't mean you should (risk it).
So you should distance yourself from any existing designs (design things as if you were given description alone). Use the core ideas (in spirit, that is) and incorporate your own ideas as well. If you absolutely have to make things similar, make names/designs original-but-close in an "everybody knows what you mean" sort of way (Mikey Mouse, Polkamen, McDarren's, Burger Lord, Harold Sampson, Harvey Potter and the Alchemist's Stone, Lucas Cloudrunner) and design your game to allow players to rename characters or even specific story elements (places, events, concepts etc) via options or via data packs for people who want the names from the inspiring work (also resource packs for the assets themselves).
I would be even more paranoid than that: I wouldn't even mention the inspiring work in any official capacity. Much like renaming/resource packs mentioned above, fans as free to do what they want. If others make comparisons, that does not concern the project itself. It wouldn't even give keywords for bots to latch onto, just like I'd try not to give even a shred of legal justification in the work itself.