I think the original source on this story is Martin Lipton of The Sun. So take it up with him if this gets you all happy and excited and then nothing ever comes of it.
"Chelsea are winning the race to sign £25m-rated Lyon striker Alexandre Lacazette. The Blues will offer £15m plus Loic Remy to see off Manchester United's interest in the talented 23-year-old French international."
"Lacazette earns around £12,000-a-week at Lyon and will be offered over four times that at Stamford Bridge."
"He shares the same agent as Chelsea defender Kurt Zouma's brother, Lionel, and it is understood that contact has been made between the two parties. But it is the offer of Remy in part exchange which could swing the deal."
-source: The Sun
With Lacazette just barely eking out a living on his food stamps, he's surely looking forward to his big payday this summer. Bayern Munich have been rumored as a potential destination as well, alongside usual suspects like Paris Saint-Germain.
As much as I like Remy as a model professional and a useful backup (whenever he manages to not time his injuries to coincide exactly with Diego Costa's), Lacazette would be a fantastic change-of-pace (yet still deadly) addition to the striking corps. The £25m valuation doesn't sound unreasonable for the soon to be 24-year-old, who scored his 31st of the season earlier today in Olympique Lyonnais' 2-0 win.