By Dan Marsh Wrexham director Humphrey Ker admits that a third consecutive promotion could yield more negatives than positives for club owners Ryan Reynolds and Rob McElhenney. The Hollywood stars have overseen a remarkable change in the club’s fortunes since acquiring Wrexham in 2020 with the Red Dragons going from non-league to League One in the space of two years after sealing promotion from League Two earlier this month. Wrexham last played in the third-tier 19 years ago but are heavily fancied to be in the frame for promotion to the Championship next term given Reynolds and McElhenney’s v…