Salazar Slytherin via Grindelwald to Draco

[Hagrid]

No: HPFGUIDX 153543

I have a MAJOR theory about things stem back through Grindelwald to 
Salazar Slythern and how it influences Lord Voldemort and his desire 
for Draco as the ONLY one to AK Dumbledore.

BUT - If we correctly guess major suprises to JKR's story, do you 
think she would change what she was going to say just to keep 
control of the story - as I have when telling bed time stories.

Minor examples were the rumours about Mark Evans, the 10 year old in 
OOTP and the possibility he was related to Lilly Evans and would get 
an Owl Post the next year to attend Hogwarts.

Or Arabella Figg with all her cats and taking care of Harry every so 
often. Rumours went around she was a witch there to protect Harry.

Did these story lines get watered down to say "NAH! You thought you 
guess what I was thinking, but you're wrong."

Should I or Shouldn't I? .... I will post the theory in 3 days 
unless you think it will damage JKR's writing inspiration.