Conquest was the title given to 4.87, by the Development Team of that time. Most of them have departed by now. It was intended, however, to refer to the conquest of Leeds, which was the major storyline focus back then.
The team at the release of 4.88.0 did not give this version of Discovery a new name. Some time ago, however, the Administration Team coordinated some votes (community public and staff private) about giving 4.88 a name - this will be used by the Development Team for the official release title of 4.88.6, also known as 4.88 Final.
For fun, it was to be included in the splash screen for 4.88.5, made by @evanz, however due to a number of circumstances, that won't appear until the last hotfix for it, which is soon.
Now that the misconstrued purpose of the title has been discussed, I'll simply say no in regards to the "conquering systems" idea. There have been many discussions about it from time to time, and this answer remains the same.