The teenager is a keen user of the social networking site often being the first to break major club news and inside information to supporters.
His account has over 60,000 followers, many of whom want the latest gossip on possible signings to be made by the club.
With all due respect to West Ham, Neymar was destined for bigger and better things as he rose to global prominence earning a move to Barca and fulfilling his promise as 'the new Pele'.
Premier League move rumoured again
Issues over tax in Spain has sparked speculation linking the 23-year-old with a move to the Premier League, as reported by the Mirror.
And West Ham recently revealed they will be in the market for a marquee striker signing when they move to the 54,000 seater Olympic Stadium this summer, as reported by the likes of the Evening Standard.
So when a picture emerged on the internet of Neymar appearing to do the famous 'crossed Hammers' celebration it stirred some excitement.
And some supporters may have been overcome with that excitement had they seen Jack Sullivan's Twitter feed before the transfer window slammed shut on Monday.
'We are working on it'
The cheeky teenager responded to a fan posting a picture of Neymar doing the celebration with the caption 'Neymar is secretly a Hammer' by saying: "We are working on it... Next summer."
We are working on it... Next summerhttps://t.co/34Q6tv6oSJ— Jack Sullivan (@jsullivanwhu) February 1, 2016
Unfortunately the tweet was followed by a number of laughing face emoticons underlining beyond any doubt that it was in fact just a joke.
And like my dreams, they fade and die.