You've Never Seen the Legion at War

My friend and I had some theories about who Sammy Valdez, the boy from Hazel's past is, and what his relationship to Leo is. There must be one, because they look EXACTLY THE SAME! We had a few theories:

1. Sammy Valdez is actually Hephaestus.
2. Sammy Valdez is actually Poseidon.
3. Sammy Valdez is Leo’s grandfather on his mother’s side.
4. Leo is Sammy Valdez reborn from Elysium.
5. Leo is Sammy Valdez brought back from the dead by Hera.

My theories are #3-5, my friend thought of #1-2.

Evidence

1. Sammy Valdez is actually Hephaestus.

Pros: We learn from Gaea that Sammy moved to Texas, and Leo was...

Annabeth strode off the ship, stepping nervously onto the gorund. Annabeth didn't know if Percy had remembered her or not. What if he met someone else, after all it has been 8 months, she thought worried. She felt Jason stand beside her he was tapping his foot anxiously.
Annabeth scanned the crowd looking for messy black hair, and green eyes. She saw nothing but Romans. Then as if the crowd knew who Annabeth was looking for the Romans stood apart, making a pathway for two people.
The two people were in dark purple togas, they walked slowly as if in slow motion. Finally, after 8 months Annabeth...