According to a post made by the website
Right Cinema, a brand-new trailer for the
eighth Harry Potter film,
"Harry Potter and the Deathly Hallows: Part Two"
will premiere either online or in theaters on
January 24th, 2011.
There is currently no confirmation of this, for now.
So until this is proven to be true, consider it a rumor.
However, in the case of some past trailers,
not all the rumors are completely wrong.
Some are just a few weeks or days off the rumored date,
For now, unless this rumor is correct, expect the trailer AT EARLIEST sometime in February.