I like the idea of Godzilla attacking Seattle.
Here is my layout for a new Godzilla franchise.
The 1st film, as I have said, should be a 1950 period piece with Godzilla attacking the States instead of Japan. I'd also like to work in Godzilla attacking the Soviet Union, perhaps at the beginning of the film. Maybe, for one reason or another, the Soviets wouldn't know what the hell attacked them and they could blame the U.S. until Godzilla surfaces and attacks America as well. Bring back the original Japanese score, a CGI Godzilla that LOOKS like the original Godzilla, the message of Godzilla as a force of caused by the Atomic Bomb dropping, etc etc.
The 2nd film should be set in the present day, were most everything in the world is the same as it is today, except a gigantic fire bretahing monster attacked 55 years ago and the Government has been on edge, expecting another Godzilla at any time. This is why I want Godzilla to attack the Soviet Union, it balances things out and in this timeline the Soviets could not gain an advantage on the USA. Anyway, a new, more powerful Godzilla appears, but the United States is ready. Over the last 55-60 years, the US government has developed Mecha-Godzilla as a counter measure to another Godzilla attack. Along with Godzilla returning, include another monster, perhaps Anguirus as a nod to Godzilla Raids Again. This provides Godzilla with a mosnter to brawl with, and Mecha-Godzilla a monster to kill. I'm already having visions of the final battle between Godzilla and Mecha-Godzilla, along with military, taking place in the Nevada/New Mexico desert, both sides going balls to walls. After Godzilla reigns supreme, it's HERE that the United States is forced to drop a Hydrogen bomb to kill Godzila.