Is your brand timeless?
When it comes to brand, it is important to have a brand that is timeless. Yes, it may evolve, but you wouldn't change it year-on-year and hopefully not within 5 years.
An Australian brand that always comes to mind when talking branding is VB. "You can get it walking, you can get it... " voice over on all of their television and radio campaigns played with exactly the same voiceover decade after decade. I remember it, my mother remembers it and my grandfather remembered it. It lasted the generations and VB will never be the same without it.
When developing a new brand, think about how long you can live with it and whether it will be timeless or not.