Smaug was only in three scenes in the Hobbit.
1. When Bilbo first saw him sleeping.
2. When Bilbo returned and Smaug tried tricking Bilbo into reavealing himself.
3. When Smaug goes on a rampage, the the village over the lake (I forget the name) and gets killed because of his recklessness (and a special arrow shot by Bard).
David Prowse... 🙂
They had reminders of Bilbo's journeys of the Hobbit in the FOTR film. The firework that looked like a dragon was a reminder of Smaug, and Bilbo was telling his story to the kids, although it was about the 3 trolls by that point.
I want to see the Battle of the Five Armies. Very cool battle, even though Bilbo gets knocked out by a stone during the climax! 🙁
A few references to Smaug in The Fellowship of the Ring
There were only three scenes that hinted at Smaug in TFOTR:
When Gandalf looked at Bilbo's map and saw a drawing of a dragon over Erebor, The Lonely Mountain. That was where Smaug lived.
When Gandalf said "If you're referring to the incident with the dragon . . . I merely gave you a push . . . "
The Dragon firework at Bilbo's 111th birthday party.
I was so excited at each of these scenes that I yelled (out loud in the theater) "SMAUG!"
😂