I doubt it is going to attract new miners after halving. Litecoin price already climbed higher levels due to expected halving,so pro investors no wait for the reaction by market traders in order to buy more Litecoins.
I agree, if miners are planning to mine Litecoin now should be a good time do it since there's still more than a month left(estimate) better take advantage of the higher reward now than wait after it gets reduced.
if they start from now and collect much litecoin they will get much profits when halving done in august.miners reward will reduced and it will bring positive effect to litecoin price.maybe the same thing will happen to bitcoin next year.