For one, I would like to have an anthology-styled comic. What I mean is that in one story, it's focused on Mario doing a simple princess-saving, while in the other, we have Yoshi attempting to find his favourite fruit but it is surprisingly hard to find. Because Mario is a series where a sprawling epic is non-existent, having short and simple stories fit the brand better, compared to what I think is the direction the Archie comics pitch is going to go if it were to be approved. It would also mean that different Mario characters could be highlighted better, since the series has several Mario characters that don't necessarily get a chance to shine in the games. So maybe for example, we can have Daisy having her little problem to solve, completely divorced from Mario and the rest of the main characters. This would be an ideal direction because that means someone can pick up a comic and not need to go back to previous issues to understand the whole story. Now that is not to say they should stick to this direction all the way, because I am all right if they want to make a longer story that could span multiple chapters. After all, Mario has times where a bigger story is warranted, such as perhaps a hypothetical Super Mario Galaxy adaptation. Ideally it's best that whatever happens in the occasional multi-parter isn't essential to future plots.
One of Mario's strengths is that he is identifiable in different styles, so while a consistent style is usually better for a comic series, I wouldn't mind it if certain artists drew Mario in their own styles, which is to say something that is still identifiable to Mario himself. Mario's has had many great styles over the years, including the cartoony style of Mario & Luigi, the sketchy Mario Strikers style and the somewhat pudgy Mario from the DiC cartoons. These different Mario are also all treated as the same Mario, and I would like to see some different styles implemented in a Mario comic, to showcase some neat artistic directions.
