damus already uses kind 6 for reposts, so I guess your client won't see those. We might want to figure out a common format before we have incompatible retweets.
Yours will look like a single post with an event link on my client atm, no preview.
Discussion
I like a new kind because it is much more explicit and comes with the preview optimization. Otherwise you are left interpreting the contents of a text post which can be ambiguous between clients.
lol i did a lot of interpretations. will have to watch how you implement it
no it won't but again holding off on new kinds in general. even if kind 6=reposts, i still want to be able to render kind 1 events nicely first. not as a standard, just my personal pref. as long as all the same content is available between clients that should be compatible enough