In its present format Zee Keralam is not even competing with nunber 4/5 surya Mazhavil. Asianet has no threat. But in media people are conservative and very much into numerology, good bad timing etc. Hence Star will wait for 6/12 months to check impact and only then go for re branding to Star Asianet.
Kannada is a different marker but still it'll be in their minds that Change over of Suvarna to Star Suvarna not only didn't help rather reduced the ranking. However Maa to STAR Maa helped gain nunber 1 position