Thor and Aquaman - planning the costumes

First step in my Halloween costume construction is to plan out the elements. I do this to get an idea of the scope of the work as well as supplies I'll need. At this point I have procured most of the supplies with just a few items yet to arrive (ebay purchases). I hope by drawing things out (despite my lack of designer level sketch ability) that I won't discover at the last minute that I overlooked some critical element and be forced to spend too much money, compromise, or even do without.
The basic Aquaman costume, represented on the left, should be pretty simple, except perhaps for the gloves (which I plan to sew rather than purchase). I have a fingerless glove pattern that could be adapted for fingered gloves - alternately I could design a simple pattern by cutting out two (flat) glove shapes - but I will lose the dimension offered by the fabric piece that runs between the fingers (but may be pretty tricky to sew). The most complex element of Aquaman is going to be the seahorse - which I visualize for this costume as a stick horse although I plan to attach a tail at the bottom end of the stick. Again I have a pattern to adapt but it will require reshaping for the head. I will have to draft the tail pattern from scratch myself.
Thor, shown on the right will be more complicated. I expect to make his tunic/jerkin from suede cloth(with silver lame circles) but I haven't decided how best to fit the top. Options include: open in back to fasten with velcro; open in back to fasten with snaps/snap tape; incorporate stretch panels in the sides so the top can be pulled on. The suede cloth is one of the supplies I'm awaiting so I will see how much stretch, if any, it has before making a final decision. I am not going to style the tunic as a bodysuit (fastening under the crotch) due to comfort concerns but I will shape it so that it hangs down in the front coming to a point so the visual image is similar.
I have not yet decided exactly how I will make the two character's belts, but both are yellow and I have some yellow fabric for Thor's boots (which will in fact be spats or gaiters for this costume). I have one thick elastic belt with plastic buckle that I can cover with the yellow, making a sort of applique design for Thor's logo. I''ll likely fashion Aquaman's "A" buckle out of a scrap of plastic or heavy cardboard (milk bottle, etc.) and then cover it with a coating of fabric.
Next - fabric choices; making the tights.