Yeah, I would always consider the announcer to be the woman who does voiceover announcements and the advisor to be the pop-up guy with hints & tips
In relation to what I thought the topic was about:
I'm guessing the announcer will want re-voicing at some point? If this were to happen, what would be the vision in terms of voice? Male/Female? Accent?
In the hopes of being helpful, I've made a quick spreadsheet with all the already recorded announcements that I've found and tried to organise them into groups (commenting enabled to anyone with this link). https://docs.google.com/spreadsheets/d/1JKFvwl4cCF3a2TeKHntyFidLuZopH9GB92CAwJ31GfQ/edit?usp=sharing
May help with proposed priority system.
If people feel like suggesting things to add to this list, just say and I'll put a new bit in (for when a re-voicing is attempted)