This thread is a vast improvement on the last pitch, and it's good that you give as much detail as you do about what you'll be contributing and what specifically you had in mind for the scope of your project.
But one thing that gets me, and has been mentioned, is your wanting to "establish a brand" with absolutely no work behind it. I get that getting the body of work going here is your goal so that you can then establish your brand as the long term goal, but...
Again, everyone wants to establish a brand of their work, and this is assumed by virtue of the fact that they are doing the work. They have something to show, they've created something that will become their brand. Have you actually done any of the writing for your suggested story ideas? Or did you just come up with the summaries to highlight what format you wanted to utilize for a revolutionary new content presentation? Because right now, you could be writing these stories, or working on your big story, and have something real and tangible for your artist to actually work with.
I don't think dreaming big or having these bigger goals of "unique presentations" and "enthralling storylines" is bad in itself! But if it comes off as arrogant, it's because you're talking about these things before actually having any singular element to build off of. If an artist came up to you right now, ready to go, would you have a script for them to illustrate? Would you be ready to animate or add sound or whatever you want to their drawings? Would you be able to do this? And can you ensure that the result would indeed be enthralling?
Have some work built up first, get a feel for whether it's working or it's what you want, and then worry about establishing a meaningful internet presence and being heralded for your work.