I won't claim that somehow Kurt Cobain was the next John Lennon, although I can see some strong similarities. Both had an amazing ear for pop music; Bono of U2 once claimed that the Beatles wrote classic pop/rock songs, much as the Beatles did. An interesting note, Kurt wrote About a Girl after spending all night listening to Meet the Beatles.
Both had a disillusionment with society and expressed it often times very angrily. While John was much more extroverted with political protests, Kurt would internalize these concerns and fears, which would eventually lead to his own collapse. Both were also universally beloved by their own generation, and not to sound clich?d, but both were very much the voice of their generation.
In the end, maybe the comparisons stop here and their only real link is that they were both exceptionally talented songwriters. But, it