Yes, there might be some family - friendly fanfiction out there that involves a sweet moment like a kiss between Mia and Martin. However, Lego Friends is mainly aimed at a younger audience, so such fanfiction would likely be quite innocent and focus on their friendship and positive interactions with a touch of affection.
It would probably be very innocent. Maybe it would start with Mia and Martin having an adventure together in Heartlake City. They might share a moment of realization about how much they mean to each other and then have a quick, shy kiss. It would be full of positive emotions and would not have any inappropriate content.
I think they are good. The Martian Manhunter comics usually offer interesting adventures and explore his unique powers and personality. However, like any comic, it might not be for everyone.
I think it's quite good. The storylines are engaging, and the art is often top-notch. However, it might not be for everyone as it can get a bit complex at times.
Manhunter is purely fictional. The plot and characters were made up by the writer or creators for entertainment purposes and not drawn from real-life events.
One of the best is 'New Frontier'. It shows Martian Manhunter's struggle with his identity in a new world. His alien nature and his longing to fit in are beautifully depicted.
In Lego Batman 2 set in Lego Gotham City, the story revolves around Batman's efforts to keep the city safe. He teams up with Robin and other heroes. They have to deal with the likes of The Joker and his devious plans. There are also side stories involving the other characters in Gotham, and the whole thing is filled with the charm of Lego building and play. For example, there are parts where they have to use Lego gadgets to solve problems and progress through the story.