No more LN and replaced with someone else? The results would most likely be a headache of clients and users dealing with different tokens. Headache with clients dealing with supporting tokens with their implementation and organization, headache for the user to learn about them and worry about scams and their fav clients not have what they want. That's all assuming your average crypto, unless somehow new tokens can be created on the same LN tech where addresses are the same (which I think this might be a possibility from what I remember some projects are trying to do, not sure).

In terms of a whole new thing... Create your own funny money based on a person's noun and send it? =P