Hugh Mitchell is not dead. He character never appeared after Chamber of Secrets so we can presume that either the actor expressed to wish in returning to the role, became to old to play the part or the new directors just decided that didn't want him. Certainly David Yates seems to have replaced him with the second year Nigel who never once appears in the book.
If Colin does not die in this film then there will be many annoyed fans.
The last movie is named Harry Potter and the Deathly Hallows part 2
She was in Harry Potter and the Deathly Hallows Part 2, played by Kelly Macdonald
Well his character doesn't exist in the books so he isn't needed and it hasn't been announced that he is returning so it's unlikely.
Charity Burbage, a professor in Harry Potter and the Deathly Hallows, will be played by Carolyn Pickles in Harry Potter and the Deathly Hallows: Part I.
William Hurt does not play a part in Harry Potter and the Deathly Hallows Part 1.
No, but his brother Colin Creevey dies in Harry Potter and the Deathly Hallows
It is unknown, he was just mentioned among the dead.
He is in the book, but it looks unlikely that he'll be in the films - he isn't listed in the cast.
Yes, he is murdered by Death Eaters during the final battle.
It is unknown whether Denis gets married as his brother dies in the deathly hallows. He may have got married but it is impossible to tell.
Colin Creevey died in the Battle of Hogwarts. Harry saw Oliver Wood carry his body into the Great Hall. The specific cause of death is unknown, but it is likely he was killed by a Death Eater.
There is no book after Deathly Hallows, it is the last.
voldermont bellatrix colin creevey crabble severus snape tonks remus lupin fred weasley and 47 others
Fred died in the deathly hallows! :((((((
Fred, Tonks, Remus, Colin Creevey (Nigel), Voldemort, Vincent Crabbe, Severus Snape, Bellatrix Lestrrange, Nagini (Voldemort's snake),
Fred Weasley, Colin Creevey, Remus Lupin, Nymphadora Tonks, Severus Snape, (Can't think of anymore off the top of my head)
The Deathly Hallows is being divided into two movies. After the Deathly Hallows Part II, the series will be over.