A. Wallace Bruce Wayne and Martha Linda Wayne
B. Gemini (of course)
C. Iris and Thomas met during one of the world ending battles and started dating after that. They got married after Iris discovered her pregnancy.
D. Wallace - 6'0", athletic build, brown hair, brown eyes Martha - 5'8", red hair, blue eyes
E.
1. Wally makes it a point to tell Bruce that Wallace has his name and it's first.
2. Both are speedsters like their mom, uncle and grandfather, though Wally does like the Bat gadgets.
3. Aunt Maria spoils them rotten and will get them anything they want. Especially if it would drive Thomas crazy.
4. Martha has expressed interest in Wayne Enterprises and hopes to run it one day.
5. Both were on the Teen Titans and when they got older Martha went to the JSA and Wally went to the JLA