Newcastle United fans received some disappointing news regarding Alexander Isak on Wednesday night, but Thursday has offered a positive injury update. While Alexander Isak could now be out for between two and four weeks after being forced off against Aston Villa, Eddie Howe could suddenly have some players back. Newcastle United face Luton Town at St James’ Park on Saturday, as they look to build on Tuesday night’s incredible win at Villa Park. But Luton will be feeling confident too, having beat Brighton 4-0 on the same night, while they also won the reverse fixture against the Magpies. It is…