Pretty sure its just click bait. They may well announce a mid size version which people think is a new air but there has been as many rumours of this being pushed back until September for an education release. I find it hard that that will offer a 12" and a 13". More likely that it will be bigger 14-15"
The new 10nm Y CPUs that were slated for this product have been delayed until 2019. Those CPUs they talk about are more suited for the low end macbook pro without touchbar unless they add a higher watt CPU but doubtful they will. With no new hardware to add the likelihood of them adding another port is minimal... the only thing I can think will happen is that they will reduce the price.
The macbook and macbook pro dual cores are already so close together I doubt we will see a quad or hex in the macbook. Its a reason to make the 13" macbook pro look like a decent option again.
It's not just click bait. They seem to be going off other rumours from various articles analyst predictions around the net (including from Ming Chi-kuo), stating that a new 13" MacBook may be appearing in 2018. I can see that happening, even without updates to the Y series CPUs. They could simply re-use the existing Y-series CPUs or else even add an Apple A11(X) or A12(X) MacBook or two. I am confused by the predictions of the lower price though, unless they're comparing against the MacBook Pro, or if the 12" MacBook got a price drop too. The third option is that they would just continue to use non-Retina screens in a 13" model to keep pricing low, but that would mean it's an Air replacement (and a disappointment IMO).
I should point out there is a 10 nm Y CPU floating around out there that appears to have started shipping in low volume to OEMs back as early as December 2017, called the m3-8114Y, which on paper is rumoured to be faster than the current i7-7Y75, at least for base clock. (Turbo clock unknown as of yet.)
However, it doesn't seem like the m3-8114Y would be released in a MacBook in 2018 since Intel says they aren't producing 10 nm CPUs in high volume yet. Also, I haven't seen any reference to corresponding i5 or i7 models yet either.
We won't see quad in the MacBook until Ice Lake which won't be out until late 2019 or sometime in 2020. However, it would be nice to see all the 13" MacBook Pros get quad-core this year, with the 15" models getting hex-core. That would make for a great distinction from a dual-core 13" Y-series MacBook.