I hope these examples are an helpful inspiration for others.
My two Batwoman cups:

The left one is self created with 3 motives from season 1.
The right one I found on redbubble.
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My Batwoman magazines (the cover issues) and my Batwoman figurine:

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A Batwoman COUNTDOWN clock I created, sorry for the rather bad image. I bought the clock, put the figurine on it and printed the promo art for the sides. Not really good visible on this picture...

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The 3 Batwoman posters I ordered to print with pictures I send in:


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And my lastest item. The Batwoman Season 1 memory:

2x32 pictures and around 7 x 5 cm wide.
I edited pictures and an online shop printed them on cardboard as they sell these picture memories.