Assuming we are on Saturday 29 Jul, and I am talking to my friend about a meeting on Monday 31st Jul 2 days later. If I say to him "Let's meet this Monday" is it equal to saying "Let's meet next Monday"?
I doubt it because the preposition 'next' can be related to the last Monday, but on the other hand, it can be related to this Monday, and the meaning would be totally different.