No, just no. Lewis is one of the best heavyweights of all time, and had superb fundamentals. The only way to defeat him was catching him off guard which happened twice (and he got the revenge anyway), but he dominated every fight he had on his career, while fighting some of the best fighters ever. Peak Tyson and Bowe wanted nothing to do with him.
Joshua has average boxing skills, he doesn't move his head, he gets gassed almost every fight (with the exception being the fight vs Parker, which is the best fight of his career) and he has no chin. Sure, he has devastating power and being a giant gives him an advantage, but he is nowhere near Lewis. A 35 years old Lewis would have eaten Joshua for breakfast.
Bruno's comparisons are probably a bit premature, but let's face it, Joshua has been extremely overhyped (and I even like him as a boxer). His most impressive win came against a 40 years old Klitschko, in a fight, he got knocked down. To make things even worse, that happened after he knocked down Klitschko in the first place, but somehow he was lucky to survive that round, and then touched the canvas in the next one.